Vector Network Analyzer designed a simple and practical PC control software. Touchstone (snp) files can be exported through PC software for various radio design and simulation software. Upgrad Vector Network Analyzer improved frequency algorithm can use si5351's odd harmonic expansion to support a measurement frequency of 900MHz. A metal shield is designed to reduce external interference and improve measurement accuracy The 50K-300MHz frequency band directly output by si5351 provides dynamics better than 70dB, the extended 300M-600MHz band can provide dynamics better than 50dB, and the 600M-900M band is better than 40dB Upgrad Vector Network Analyzer added battery management circuit and redesigned PCB and update software, Support to connect to most Android phones display on the same screen, support time domain analysis function (TDR) etc For any question about the product before or after order, contact us freely, we will be glad to assit you